# Sun Index - Vitamin D & UV — Optimize Your Sun Exposure > Personalized sun exposure guidance for vitamin D, UV index, and skin health. (iPhone/iPad app by Comfable Inc..) - Source: https://appshunter.io/ios/app/sun-index-vitamin-d-and-uv/id1117106666 (this page in markdown: same URL + `.md`) - Developer: [Comfable Inc.](https://appshunter.io/developer/1117106665) - Category: Health & Fitness, Weather - Price: Free with in-app purchases - Rating: 3.89/5 from 230 App Store ratings · 53 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 29 MB - Languages: English - Released: 2016-05-27 - Data updated: 2026-06-10 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/sun-index-vitamin-d-and-uv/id1117106666/reviews.md ## What is Sun Index? With Sun Index, balance your sun exposure and vitamin D, avoid sunburns, find the current UV (ultraviolet) index, and get personal sun safety tips for healthy & young skin. Sun Index lets you know when it’s time to seek sun protection, and helps you prevent skin aging and skin cancer. The Sun Index app is already helping thousands of people worldwide enjoy a healthier life. EXCLUSIVE FEATURES: • Get sun safety notifications when the UV index reaches high levels. • UV map for anywhere in the world. • Find out how much sunscreen to wear based on your size and clothes. • Scan any sunscreen’s barcode to find out if it’s right for you. • Find your skin age and skin health score with AI technology. • Track your mole with AI technology. • Track your vitamin D production from the sun, food, and supplements (Pro version). Sun Index App Pro - Try FREE for 7 Days on Yearly Subscription Get a 7-days free trial when you install and subscribe at any time using the in-app purchase.* No matter your lifestyle or skin type, Sun Index is the perfect sun safety advisor to help you keep on top of your skin health. * Subscriptions for Sun Index are $3.99 per month or $23.99 for a full year. Subscriptions are billed monthly or annually at the rate selected depending on the subscription plan. Subscriptions auto-renew at the cost of the chosen package, unless cancelled 24-hours in advance prior to the end of the current period. The subscription fee is charged to your iTunes account at confirmation of purchase. You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. Per Apple policy, no cancellation of the current subscription is allowed during active subscription period. Once purchased, refunds will not be provided for any unused portion of the term. * Find the full terms and conditions, and our privacy policy, at https://sunindex.co/terms-conditions and https://sunindex.co/privacy-policy respectively. ## Key features - UV index alerts - Global UV map - Sunscreen recommendations - Sunscreen barcode scanner - AI skin age and health score - Mole tracking - Vitamin D tracking (Pro) ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | QSun App Pro - Monthly | $3.99 | per month | | QSun App Pro - Yearly | $23.99 | per year | ## Recent user reviews (10 of 53) All indexed reviews: https://appshunter.io/ios/app/sun-index-vitamin-d-and-uv/id1117106666/reviews.md ### 4/5 — Mostly good *2024-07-10* I like this app a lot because it reminds me to wear sunscreen and highlights the importance of wearing spf to prevent skin cancer and premature aging. My only suggestion is that dark circles shouldn’t be categorized as a problem associated with aging. Dark circles are caused by a variety of factors and for me that is seasonal allergies. The dark circles list make my age 28 when I’m in fact 21. I also have freckles but that is more of a genetic thing or can be attributed to my skin type. ### 1/5 — Doesn’t work *2024-05-10* I enabled the sun tracker to track my vitamin D and it doesn’t even work after paying for the subscription. It doesn’t even track anything it just freezes even with the UVI at 7 it says I’ve gotten 0 Vitamin D after 25 minutes in the sun. I’ve reinstalled the app, checked my IOS version, and restarted my iPhone and it still does not work. Broken app. I regret paying for the subscription and would like my money back. There is a free app called Dminder and it actually works. Edit: Day 2 of trying to track and it still doesn’t work. It tried to work in the middle of the night when the sun wasn’t out. Won’t work during the day when the sun actually shines. Edit: Over a week later and the app still doesn’t work. Edit: still doesn’t work ### 1/5 — Doesn’t work *2024-05-04* I enabled the sun tracker to track my vitamin D and it doesn’t even work after paying for the subscription. It doesn’t even track anything it just freezes even with the UVI at 7 it says I’ve gotten 0 Vitamin D after 25 minutes in the sun. I’ve reinstalled the app, checked my IOS version, and restarted my iPhone and it still does not work. Broken app. I regret paying for the subscription and would like my money back. There is a free app called Dminder and it actually works. Edit: Day 2 of trying to track and it still doesn’t work. It tried to work in the middle of the night when the sun wasn’t out. Won’t work during the day when the sun actually shines ### 4/5 — Love this app, but sad about the pro cost *2022-09-26, version 1.9.37* Love this app! I am fair skinned and exposure conscious because wrinkles are bad in my family and I love this app. I love how it tracks your exposure, alerts you for various things as you ask it to, analyzes your sunscreen, AND SKIN via selfie.. which even if it’s not accurate it’s hella fun to use. My friend and I love to take different pictures and compare our skin age ha :). My only wish is that the free version offered what the pro version offers because you really miss out on the useful & super fun features just using the free version and although I love this app, have been using the free version for over a year now, after doing the PRO version trial and seeing what I had been missing I don’t think I can go back to using the free version. :( AND UNFORTUNATELY at $3.99 a month even if I wasn’t going through changing jobs right now and money wasn’t tight I just honestly think $4 a month is a lot. So I plan on keeping the free version of app installed on my phone, but will be on the hunt for a competitor app offering the same features seen in the Pro but for free or cheaper. :/ ### 1/5 — Latest version does nothing without $$ *2022-04-24, version 1.9.37* Need $149 device to track exposure & Vit D. Free Version does nothing. No timer no exposure. No Vit D estimate. Latest update eliminates any usefulness of this app with paying for pro. Free App used to let one track exposure and supplements. Cannot even get a timer and turn notifications in current version. Only use it occasionally so $25 a years is a no go. Deleting app after this review. On a side not why does the App Store keep my deleted and obsolete apps? I want them gone permanent. ### 1/5 — Bad ui, not suitable for measuring vitamin d *2022-03-20, version 1.9.37* I wanted a replacement for dminder because their UV for my location has been wrong, but this completely doesn’t work. It’s so confusing. ### 2/5 — Disappointed *2021-09-03, version 1.9.36* I was really excited about this app thinking it would help me a lot more than other apps I’ve tried but all the features that downloaded the app for you can only use if you pay :/ ### 5/5 — Skin Cancer *2021-08-28, version 1.9.36* I have had skin cancer several times. This device allows you to accurately assess your sun exposure. Only downside is that there is currently no way to attach the QSun to a watch band. ### 5/5 — Awesome idea!! *2021-08-18, version 1.9.36* Love this app, though for $150 for the device that I could easily loose should comes with a lifetime access to the full app not just a year. it’s pricey and so is the device but the free version helps a lot with sun exposure especially out in Colorado where the sun is intense. ### 2/5 — Decent App .. not able to unsubscribe or prevent auto renew *2020-07-16, version 1.9.12* The app is decent.. but doesn’t feel accurate without the device. The pro sub is basically useless.. and they are constantly trying to upsell the device. . I tried to cancel the pro sub or even not auto renew after the 7 day trial and there is no such option (in the account settings) on the App.. even though the description here says so. Emailed support.. hopefully they will cancel. Sneaky guys. Dishonest experience. Sad business practice. Update - The App takes forever to start. Basically useless ## Frequently asked questions about Sun Index ### What does the Sun Index app do? The Sun Index app helps you optimize your sun exposure for vitamin D production while avoiding sunburn and protecting your skin. It provides the current UV index, personalized sun safety tips, and alerts for high UV levels. The app aims to help you prevent skin aging and reduce the risk of skin cancer. ### What are the key features of Sun Index? Key features include real-time UV index alerts, a global UV map, personalized sunscreen amount recommendations, and a sunscreen barcode scanner. It also offers AI-powered skin age and health scoring, mole tracking, and vitamin D production tracking in the Pro version. ### How much does Sun Index cost? The app offers a free version with core features. A Pro version is available via a yearly subscription, which includes a 7-day free trial. Subscriptions cost $3.99 per month or $23.99 annually, with auto-renewal options. ### Is Sun Index compatible with my device? The provided description does not specify exact compatibility details. However, it mentions subscriptions are managed through iTunes, suggesting it is available for iOS devices. It's recommended to check the app store listing for specific device and OS version requirements. ### Who would benefit from using Sun Index? Anyone who spends time outdoors, is concerned about vitamin D levels, wants to protect their skin from sun damage, or wishes to monitor their skin health would benefit. This includes individuals with fair skin, those living in sunny climates, and people aiming to prevent premature skin aging and skin cancer. ## Version history (last 5 releases) ### 1.9.47 — 2023-03-22 Our primary goal is to continuously improve your experience with every update. Speed improvements, bug fixes and tweaks for a high-standard app. ### 1.9.44 — 2023-01-19 Our primary goal is to improve your experience with every update continuously. Speed improvements, bug fixes and tweaks for a high-standard app. ### 1.9.40 — 2022-11-21 We’ve fixed bugs and made improvements to make your experience better. ### 1.9.37 — 2022-02-28 Our primary goal is to continuously improve your experience with every update. Speed improvements, bug fixes and tweaks for a high-standard app. ### 1.9.36 — 2021-07-31 Our primary goal is to continuously improve your experience with every update. Speed improvements, bug fixes and tweaks for a high standard app. ## Apps similar to Sun Index | App | Rating | Price | Category | | --- | --- | --- | --- | | [SunDay: Vitamin D & UV Tracker](https://appshunter.io/ios/app/sunday-vitamin-d-and-uv-tracker/id1133953409) | 3.9 (33) | Free | Health & Fitness | | [Charm: Skincare Routine 360°](https://appshunter.io/ios/app/charm-skincare-routine-360/id1480983279) | 4.5 (1,485) | Free | Health & Fitness | | [ZYRTEC® ALLERGYCAST®](https://appshunter.io/ios/app/zyrtec-allergycast/id320298020) | 4.1 (522) | Free | Health & Fitness | | [Circadian: Your Natural Rhythm](https://appshunter.io/ios/app/circadian-your-natural-rhythm/id1495373007) | 4.6 (657) | Free | Health & Fitness | | [UVLOOK Lite](https://appshunter.io/ios/app/uvlook-lite/id6443407285) | 3.0 (2) | Free | Health & Fitness | | [TroveSkin: Skincare Coach](https://appshunter.io/ios/app/troveskin-skincare-coach/id1435184918) | 4.2 (724) | Free | Health & Fitness | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*